Telephone-transmitter



Patented May 9 J. H. SPENCER. TELEPHONE TRANSMITTER.

(Application led Mar. 31, 1898.)

(No Model.)

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35 faces, as shown in Figs. 2 and 3.

lINiTED ,Y STATES PATENT OFFICE.

JAMES l-I. SPENCER, OF NEWr YORK, N. Y., ASSIGNOR TO SPENCER & CO.,

QE SAME PLACE.

TELEPHONE-TRANSVIVI ITTER.

SPECIFICATION forming part of Letters Patent No. 624,697, dated May 9, 1899.

Application led March S l, 18 9 8.

T all whmn it may concern:

Beit known that I, JAMEs H. SPENCER, of the city of New York, borough oi' Manhattan, in the county and State of New York, have invented a new and Improved Telephone-Trans mitter, of which the following is afull, clear, and exact description.

The object of the invention is to provide a new and improved telephone-transmitter 1o which is simple and durable in construction, not liable to get out of order, and which is sufciently sensitive for ordinary purposes.

The invention consists of novel features and part-s and combinations of the same, as 1 5 will be described hereinafter and then pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this speciiication, in which similar characters of reference indizo cate corresponding parts in all the iigures.

Figure l is a rear face view of the improvement. Fig. 2 is a transverse section of the same on the line 2 2 of Eig. l, and Fig. 3 is an inverted sectional plan view of the same on z5 the line 3 3 of Fig. l.

The i'mproved telephone-transmitter is provided vvith a ringshaped frame A, formed with an annular seat A for the disk B, made of rubber or like material and of considerable 3o thickness, so as to be rendered but slightly iiexible in contradistinction to the thin eX- tremely flexible diaphragms ordinarily employed in telephone-transmitters. The disk B is preferably dished somewhat on both The disk Bis rmly held to its seat A by clamps C, preferably two in number, located diametrically opposite each other and secured to the frame A, each clamp extending over the back 4o ofthe disk B to engage with its end C the rear face of the disk to securely hold the same in position against the seat.

The buttons D D of thel telephone-trans'- mitter are preferably of the construction 4,5 shown and described in the Letters Patent of the United States No. 596,834, granted to J. H. Spencer and M. S'. Keyes on January 4, 1898, one button D being carried by the disk B, while the other button D' is carried by a serai No. 675,892. (No moda.) v

bridge E, secured at its ends to the frame A, 5o

as plainly indicated in the drawings. Electric wires F F' are connected in the usual mannerone with the button D and the other to the bridge E, as shown in Fig. 1. By securely holding the heavy disk B to its 5 5 seat on the frame A and by rigidly connect ing one of the buttons with the said disk suiiicient vibration is given to the buttons when sounds pass upon the face of the disk to readily transmit articulate speech and 6o other sounds to a receiver of the usual coustruction. By having the transmitter formed with a heavy disk,as described,a considerably long life is given to the instrument, and the latter is not liable to get out of order and can y readily stand rough usage.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patentl. A telephone-transmitter, comprising a 7e frame having an annular seat, a disk or diaphragm slightly dished on both faces, and resting on said seat, saidy disk or diaphragm being of considerable thickness so as to be but slightly exible, clamps secured to the frame and curved to bear at two points only on the disk or diaphragm, and buttons, one of which is carried by the disk or diaphragm and the other is supported from the frame, substantially as described. 8o

2. A telephone-transmitter comprising a ring-shaped frame formed with an annular seat, a heavy disk made of rubber seated on the said seat, said disk being slightly dished on both faces, clamps secured to the frame, and extending over the disk, said clamps being curved and having their ends only bearing on the disk, for securely holding the same to its seat, a bridge secured to the said frame, and extending over the said disk, and but- 9o tons, one of which is secured to the disk and the other to the said bridge, substantially as shown and described.

JAMES E. SPENCER.

. Witnesses:

THEO. G. HOSTEE, EVEEAED BOLTON MARSHALL. 

